Lock-nut.



Lomi NUT. Y APPLIOATIGN FILED APR.15,1905.

nle 793,900.

mbarrier trarre Patented July l, 1905.

l lililflfllllt hl tl "l" i.

SPECIFICTN forming part et' Letters Patent No. 793,90@ dated July l, 1995.

Application Eind April l5, 1905. Serial No. 255,747.

Be it known that fl, 'FRANK A. NnwjnLL, a citizen et the United States, residing at Fallon, in the county of Custer and State ol Montana, have invented certain new and useliul Improvements in Look-l hits, ol' which the Followingl is a specification.

'Ihis invention relates to that class o'l" devices which are designed to prevent screwnuts [from being worked loose from their bolts when subjected to :tree uen t or continuous arring in service-Msuch, 'lor example, as the nuts which hohl the bolts in the lishplates et `rails or the nuts in various positions on engines, cars, etc.; and its object is to bind the nut by friction upon the bolt and to lock the binding mechanism so that it cannot be worked loose without the application ol liorce directly to the binder to turn it, and yet which. may be turned loose with little injury to the buidel' when desire l.

To this end my invention consists in the constrinwtion and combination ol" parts forming` a lock-nut hereinafter more il'ully' described and particularly delined in the claim, reference being had to the accompanying drawings, in which- Figure l is aside view of alock-nut according to my invention, a portion being broken away. Fig. 2 represents the same in longitudinal section. Fig, S5 is an end view of the nut to be locked, and Fig. lis an interior view ol the lockinganit.

Numeral 5 represents a screw-threaded bolt.

(i represents the .nut which to be secured upon the bolt. The head portion ot this nut is shown as sixsided but it may have any suitable number of sides, screw-driver slots, spa]incr-holes, or other means Vlor engage- Vment by a wrench or other tool for turning it. The portion 7 oit its body is a little taperi ng and :is screw-threaded on its tapering sur- 'liace with the same thread to the inch as the thread inside of it and the thread on the bolt. This tapering body 7 has radial longitudinal slots 8 through to its interior opening.

l) represents the binding-nut, bored and threfnled to be screwed. upon lthe bolt 5 and counterbored and threaded in at one end to receive the tapered portion 7 oli' the nut (i at the saine time that both of these nuts are screwed upon the bolt 5. The bottom el the counterbore has radial notches Al() to receive the projectingl ends et braces ll, which are located in the slots 8. These braces may be made of .flat wire or ol' narrow strips et stili non-elastic material and narrow enough not to bind on the screw-thrcanls and long enough to be pushed into the notches 10 just belore the binding-nut comes to a solid bea ring on the tapering body 7. Let `us suppose that the nut (i has been screwed to place with its lace 12 [irmly against the obj eet it is to hold. rlhen by screwingl thebinding-nut l) Vlirmly Vupon the tapering body 7 the sections o'" that body will be bent inward, so as to grip the screw 5 immovably. At the same time the lirce ends el the strip ll will have caught into the teeth l0, and as the nut continues to turn these once free ends will be bent backward and stand as braces against the teeth 1() to resist all tendency ol the binding-nut to become unscrewed or loose by any amount ol jarring. The nut may also be thus rigidly secured at any point upon. the bolt 5 to serve as a head or shoulder thereon Afor any purpose. Whenever it becomes necessary to remove one ot these nuts, there must be sull'cient iloree to turn the nut l) applied backward against the braces ll, so as to break them oll' or crilnple them backward. rl`heir cost is too little to be considered. lll/lith pro])erlyditted nuts (j and bolts 5 the inward spring olE the body-segments 7 is almost immeasurable, so that the loose lit et the braces .1l in the slots S would never prevent this binding. This device is so complete a lock to the nut that ilt the nut .V) be screwed home with the usual torce of such work the nut will be so rigidly clamped upon the screw 5 that the latter could be twisted ell before nut (S would slip on .it by a direct attempt to turn nut 6 loose.

Having thus Fully described my invention, what l believe to be new, and desire to secure by Letters Patent, is the `following:

ln lock-nuts, two nuts internally threaded to lit upon it screw; one of these nuts being i and brace-pieces looaited in the said slots to externally tapered and screw-threaded for at engage the said radial notches and loc-k the 1o portion of its length and having radial slots l bindingmuh substantlally as described.

y V.n 'i l U X l Il. .l '1' r vvu longitudin ill) tlnoubh the Sltnu pol tion, l* RANK A' N BJWBLL. the other nut being oounterbol ed and sere threaded to receive and bind upon the zrforefitnessesz said tapered portion7 and having radial N. S. WTALLER,

.notches in the bottoni of the oounterbore; 1 E. GREY. 

